CN106208474B

CN106208474B - Guide member for motor, stator including the same, and motor

Info

Publication number: CN106208474B
Application number: CN201610369645.1A
Authority: CN
Inventors: 金涌珠; 姜荣求
Original assignee: LG Innotek Co Ltd
Current assignee: LG Innotek Co Ltd
Priority date: 2015-05-28
Filing date: 2016-05-30
Publication date: 2020-03-13
Anticipated expiration: 2036-05-30
Also published as: JP6832635B2; KR102374857B1; EP3098948A1; JP2016226278A; US10135312B2; CN106208474A; KR20160139531A; US20160352175A1

Abstract

The present invention relates to a guide member structure that functions to prevent vibration of a coil, and a motor using the guide member structure. In the structure of the guide member guiding the coil wound around the stator to the external power module, the vibration-proof mold is provided in the coil guide groove, whereby a stable fixing force can be applied to the coil when the motor is driven, and a noise problem due to vibration of the coil can be solved. Therefore, the steering wheel can be operated more stably.

Description

Guide member for motor, stator including the same, and motor

Cross Reference to Related Applications

This application claims priority and benefit from korean patent application No.2015-0074579, filed on 28/5/2015, the entire disclosure of which is incorporated herein by reference.

Technical Field

The present invention relates to a coil guide member structure for a motor, which functions to prevent coil vibration, and a motor using the same.

Background

Generally, an Electronic Power Steering (EPS) system is used to secure steering stability of a vehicle. An Electronic Control Unit (ECU) operates a motor according to operating conditions detected by a vehicle speed sensor, a torque angle sensor, a torque sensor, and the like, and the EPS system secures turning stability and provides a quick return force, thereby allowing a driver to drive the vehicle safely. By using a motor that assists the torque to operate the steering wheel, the EPS system can perform a steering operation with very little power to allow the driver to steer the vehicle. A brushless direct current (BLDC) motor is used as the motor.

The BLDC motor includes a stator and a rotor as main components. A coil is wound around the stator and a magnet is coupled to the rotor so that the rotors rotate through electromagnetic interaction with each other.

The wound coil is in contact with a bus bar connected to an external power supply device, and electric power is supplied to the stator of the EPS motor formed as described above.

However, since it is difficult to fix the coil itself when the motor is operated, the coil connected to the bus bar becomes a factor of deteriorating a driving environment due to noise caused by vibration of the coil when the coil is continuously used in an environment where vibration is severe. Further, in the case of fixing the coil to an external structure using an adhesive to prevent the above-mentioned problems, there are problems in that it is difficult to completely fix the coil due to deterioration and failure of the adhesive due to an external environment, and manufacturing costs increase.

Disclosure of Invention

The present invention is directed to a coil guide member structure for a motor to enable the motor to have a more stable steering wheel operation, in which the guide member structure guides a coil wound around a stator to an external power supply module, by including a vibration-proof profile in a coil guide groove to apply a stable fixing force to the coil when the motor is operated and to reduce noise due to vibration of the coil.

According to an aspect of the present invention, there is provided a guide member for a motor, the guide member including a guide member body, at least one coil winding guide provided on an upper surface of the guide member body, and a vibration-proof profile formed to protrude from an inner side of the coil winding guide.

According to an aspect of the invention, a stator coupled with the above-described guide member for a motor and an Electric Power Steering (EPS) motor coupled to a rotor structure are provided.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent to those skilled in the art from the detailed description of exemplary embodiments of the present invention with reference to the attached drawings, in which:

fig. 1 is a perspective view illustrating a winding structure of a stator and a coil of a motor, and fig. 2 is a schematic perspective view illustrating a structure in which the stator of fig. 1 and a guide member for the motor are coupled to each other;

fig. 3 and 4 are schematic views of main parts for describing the operation of a motor provided with a vibration-proof profile according to an embodiment of the present invention;

fig. 5A to 5F are schematic views showing forms of various vibration-proof profile pieces according to an embodiment of the present invention; and

fig. 6 is a schematic sectional view illustrating the structure of an Electronic Power Steering (EPS) motor to which a guide member for a motor according to an embodiment of the present invention is applied.

Detailed Description

Hereinafter, the configuration and operation of exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the drawings, the same reference numerals are used for the same elements even in different drawings, and repeated description of the same parts will be omitted. Although the terms first, second, etc. may be used to describe various elements, these elements should not be limited by these terms. The terms are only used to distinguish one element from another.

Fig. 1 is a perspective view illustrating a winding structure of a stator and coils of a motor, fig. 2 is a schematic perspective view illustrating a structure in which the stator and a guide member for the motor in fig. 1 are coupled to each other, and fig. 3 and 4 are schematic views of main parts for describing the operation of the motor having an anti-vibration profile according to an embodiment of the present invention.

Referring to fig. 1 to 4, as shown in fig. 1, a coil guide member (referred to as a guide) for a motor according to an embodiment of the present invention is disposed on an upper portion of a stator 100. That is, the stator 100 has the following structure: the stator 100 is coupled with a plurality of stator cores 110, the plurality of stator cores 110 have a plurality of teeth formed to protrude from inner circumferential surfaces of the plurality of stator cores 110 toward the center, and a coil 120 is wound around each stator tooth 111. Also,

tip ends

121 and 122 of the wound coil protrude outward as shown in fig. 1, and the

tip ends

121 and 122 of the wound coil are coupled to terminals of an external power supply device.

As for the structure shown in fig. 2, the guide member for the motor according to the embodiment of the present invention, which is a structure disposed on the upper portion of the stator 100, may be defined as the following structure: this structure guides the multiple coil tips depicted in fig. 1 in a ring-shaped structure to be connected to an external power supply device.

As shown in fig. 2, the guide member 200 for a motor according to an embodiment of the present invention includes a guide member body 201, at least one coil winding guide 210 disposed on an upper surface of the guide member body, and a vibration-proof profile 230 (see fig. 4) formed to protrude from an inner side of the coil winding guide.

Specifically, the guide member 200 for a motor according to an embodiment of the present invention includes a guide member body 201 formed of an insulating material. The tip end of the coil depicted in fig. 1 extends from the upper portion of the guide member body 201 so as to be guided along the upper surface of the guide member body 201 so as to be guided, for example, in a specific direction toward the tip end of the power supply device (for convenience of description, the coil shown in fig. 2 is partially shown).

Specifically, the guide member body 201 includes a coil winding guide 210 having a predetermined width and depth to smoothly guide the tip end 121 of the coil. As shown in fig. 2, the coil winding guide 210 is formed in a partitioned structure to form a groove (hereinafter, referred to as a guide groove 220) having a predetermined height and width, or, although not shown, the coil winding guide 210 may also have the following structure: the guide groove is formed by cutting out a groove in the form of an intaglio.

However, in the case of the plurality of guide grooves 220, as shown in fig. 3A, grooves having a width through which the coil passes are formed adjacent to each other as designed, and as shown in fig. 3B, grooves having a width through which the coil passes are guided in a structure in which the tip end 121 of the coil is inserted along the guide grooves. In this case, however, the coil vibrates when the vibration of the motor is continuously generated. Since the width of the guide groove and the thickness of the coil are generally different from each other, the difference in the width of the groove and the thickness of the coil becomes several noise sources when driving the vehicle.

Therefore, as shown in fig. 4A, in the embodiment of the present invention, there is provided the vibration-proof profile 230, the vibration-proof profile 230 having a plurality of profiles protruding from the inner wall of the guide groove 220 toward the center. Then, as shown in fig. 4B, when the tip end 122 of the coil is inserted and guided, a uniform pressing force is applied to the coil by the anti-vibration profile 230 even in the case where the thickness of the coil and the width of the guide groove are different from each other, thereby preventing the coil from being unstably vibrated. According to an embodiment of the present invention, the vibration-proof profile 230 may be formed to protrude from the inner wall of the guide groove toward the center, and the vibration-proof profile 230 may be formed of the same material as that of the guide groove. In this case, the vibration-proof profile 230 can be manufactured very simply at the same time using an extrusion molding method and the like, and the manufacturing process can be simplified. Of course, in the case where the vibration-proof profile 230 is made of an elastic material, the pressing force can be effectively applied regardless of the use of the coil of variable thickness.

Various modifications of the vibration proof profile will be described by fig. 5A to 5F.

Referring to fig. 5A to 5F, fig. 5A to 5F are schematic sectional views illustrating a structure in which a guide groove 220, such as described in fig. 4A and 4B described above, is formed at the coil winding guide 210.

As shown in fig. 5A, the vibration-proof molding 231 has a structure that protrudes from the inner wall of the coil winding guide 210 toward the center and presses the coil 120 from the lateral direction, whereby the coil vibration can be prevented. To this end, in particular, the anti-vibration profile according to an embodiment of the invention may be formed to be equal to or less than one third of the entire width d of the guide groove. In case the width of the protruding profile is larger than said width, the versatility of mounting the coil is greatly reduced and thus the coil may be damaged.

Further, as shown in fig. 5B, the vibration-proof profile may be formed in the form of a protruding structure with a slope structure having an inclination angle formed on at least one side portion instead of being formed in a circular structure having a cross section such as a semicircle, an ellipse, or the like. In the structure in fig. 5B, in the case where the angle θ 1 of the upper slope with respect to the upper plane of the coil winding guide 210 is an acute angle, the coil can be easily inserted into the guide groove. In addition, when the angle θ 2 of the slope of the lower portion is formed in the opposite direction to the slope, the coil can be prevented from slipping off.

Further, as shown in fig. 5C, the vibration preventing profile 233 according to the embodiment of the present invention may be formed on both sides of the inner parts of the pair of partition walls forming one guide groove instead of on either side. This structure is advantageous in that it can enhance the fixing force to the coil by firmly pressing the coil from the left and right sides.

The structure shown in fig. 5D has a slope angle θ 3 formed in a direction opposite to the lower direction of the protrusion 234, and unlike the structure in fig. 5B, the structure shown in fig. 5D can maximize the fixing force after the coil is inserted into the guide groove.

Further, unlike the structure in fig. 5B, the structure in fig. 5E has a slope of a certain length of the protruding structure of the anti-vibration profile 235 such that the lower slope y2 is longer than the upper slope y1 to provide convenience of the insertion process and then enhance the fixing force.

In fig. 5F, the vibration-proof profile of the present invention is formed to have elasticity. As mentioned above, the vibration-proof profile can be formed by a separate elastic component, but as shown, the vibration-proof profile can be structurally formed with a pressing force. That is, as shown in fig. 5F, one end 136a of the vibration-proof profile is coupled to the coil winding guide 210 and is in contact with the coil winding guide 210, and the other end 136b except for the one end 136a forms a separate member from the inner side of the coil winding guide 210 and may be implemented in a structure having predetermined elasticity. In this structure, the separate part P can effectively compensate for a tolerance between the thickness of the coil 120 and the width of the guide groove while providing the pressing force. In particular, the separate member separated from the inner wall of the guide groove has the following structure: the width of the individual parts becomes larger and larger towards the depth direction of the guide groove (P1< P2< P3) in order to efficiently transfer the pressing force from the center of the guide groove towards the coil.

An example of an Electronic Power Steering (EPS) motor to which a guide member for a motor according to an embodiment of the present invention is applied will be described below with reference to fig. 6. The guide member for a motor according to the embodiment may be applied to various motors. In the embodiment, the EPS motor will be described as an example.

The EPS motor to which the guide member 200 for a motor according to the embodiment of the present invention is applied includes a motor housing 10, a stator 100, and a rotor 300, and may include the guide member 200 for a motor for supplying power to the coil 120 wound around the stator 100, and a terminal 202 connected to an external power supply terminal. In this case, the structures according to various embodiments of the present invention described above in fig. 1 to 5F may be applied to the guide member 200.

The motor housing 10 has a substantially cylindrical shape, and the motor housing 10 has an opening on an upper side thereof and a closed lower side. The stator 100, the rotor 300, and the rotation shaft 30a rotatably supporting the rotor 300 are installed in the motor housing 10.

The stator 100 includes a stator core 110, coils 120, and coil terminals 25 coupled to ends of the coils. The stator core 110 has a plurality of teeth (stator teeth), and the stator core 110 may be disposed such that the coil 120 is wound around the teeth when an insulator is disposed on the stator core 110.

In addition, as described above, the guide member 200 for guiding the coil of the motor according to the present invention may be assembled on the upper side of the stator 100 to supply power to the coil.

The rotor 300 is rotatably installed at the center of the stator 100, the rotor 300 having a structure inserted into the outer circumferential surface or the interior of the rotor core, and having a plurality of magnets installed on the rotor 300. The rotation shaft 30a is mounted coaxially with the rotor 300 and is mounted such that one end portion is supported rotatably by a lower bearing mounted on the bottom surface of the motor housing 10 and the other end portion is supported by an upper bearing mounted on a cover member, not shown. In the above structure, the magnetic field generated in the stator interacts with the electric field generated in the rotor and rotates the rotation shaft.

In particular, in this case, the structure of the guide member 200 for the motor according to the embodiment of the present invention includes the vibration-proof profile that guides the coil as described above and has a stable fixing force to the coil when the motor is driven, whereby the noise problem due to the vibration of the coil can be solved. Thus, the steering wheel can be operated more stably. Further, the structure of the guide member 200 for the motor according to the embodiment of the present invention employs a pressure fixing method of fixing the coil itself to the guide member using a physical form, rather than a method of fixing the coil to the guide groove by means of an adhesive, thereby being capable of reducing manufacturing costs and benefiting the environment.

According to an embodiment of the present invention, in the structure of guiding the coil wound around the stator to the guide member of the external power supply module, there is provided the following coil guide member structure for the motor: the coil guide member structure can achieve more stable steering wheel operation by including the vibration-proof profile in the coil guide groove to apply stable fixing force to the coil when the motor operates and to reduce noise due to vibration of the coil.

The details of the present invention as described above are described with respect to specific embodiments. However, various modifications may be made to the embodiments by those skilled in the art without departing from the scope of the present invention. Therefore, the scope of the present invention is defined not by the described embodiments but by the appended claims, and includes equivalents falling within the scope of the appended claims.

< description of reference numerals >

100: stator

110: stator core

120: coil

121. 122: tip end of coil

200: guide member for motor

201: guide member body

210: coil winding guide

220: guide groove

230: vibration-proof profile

300: rotor

Claims

1. A guide member for a motor, the guide member comprising:

a guide member body;

at least one coil winding guide disposed on an upper surface of the guide member body; and

a vibration-proof profile formed to protrude from an inner side of the coil winding guide,

the coil winding guide portion is partitioned by a partition wall into at least one guide groove on an upper surface of the guide member body,

wherein the vibration-proof profile includes an upper inclined surface and a lower inclined surface which are inclined at an acute angle with respect to a virtual horizontal plane forming an upper surface of the guide groove, and the lower inclined surface has an opposite direction to the upper inclined surface,

the top of the protrusion of the vibration-proof profile has a circular structure, and the circular structure of the top of the protrusion is in contact with the coil.

2. The guide member according to claim 1, wherein the anti-vibration profile is an elastic member.

3. The guide member of claim 1, wherein the coil winding guide separates at least one guide groove by being notched on an upper surface of the guide member body.

4. The guide member according to claim 1, wherein the coil winding guide portions are separated from each other by a plurality of guide grooves, and at least one communication portion is formed between the guide grooves adjacent to each other.

5. The guide member according to claim 1, wherein the anti-vibration profile comprises at least one or more pairs of profiles located at an inner wall of the guide groove, the at least one or more pairs of profiles protruding in a central direction of the inner wall at positions facing each other.

6. The guide member according to claim 1, wherein the width of the anti-vibration profile is one third of the entire width (d) of the guide groove.

7. A stator of a motor, comprising:

a stator core including a plurality of teeth protruding from an inner surface of the stator core toward a center of the stator core;

a plurality of coils wound around the stator teeth; and

the guide member according to any one of claims 1 to 6, which is configured to allow tip ends of the plurality of coils to be guided along coil winding guide grooves formed on a surface of the guide member, and which includes anti-vibration profiles formed to protrude from inner walls of the coil winding guide grooves.

8. A motor, comprising:

a motor housing;

a stator mounted within the motor housing and including a stator core and a coil wound around the stator core;

a rotor rotatably installed at a center of the stator;

the guide member according to any one of claims 1 to 6, which is arranged on an upper side of the stator, and which is configured to allow a portion of the coil to be wound along a coil winding guide groove formed on an upper surface of the guide member; and

a plurality of vibration-proof molding pieces formed to protrude from an inner wall of the coil winding guide groove.